Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: sbi: Refine the settings for switching to Virtual Supervisor Mode.

Browse Source 
Although Mstatus.MPV is set, before executing mret, access to VS mode
registers should use the actual register addresses, not the pseudonyms
of S registers.

Signed-off-by: Pope B.Lei <popeblei@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Pope B.Lei
2024-04-10 10:05:20 +08:00
committed by Anup Patel
parent 033104da08
commit 1d89a9da64
1 changed files with 11 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
lib/sbi/sbi_hart.c
View File

@@ -1046,10 +1046,17 @@ sbi_hart_switch_mode(unsigned long arg0, unsigned long arg1,
csr_write(CSR_MEPC, next_addr);
if (next_mode == PRV_S) {
if (next_virt) {
csr_write(CSR_VSTVEC, next_addr);
csr_write(CSR_VSSCRATCH, 0);
csr_write(CSR_VSIE, 0);
csr_write(CSR_VSATP, 0);
} else {
csr_write(CSR_STVEC, next_addr);
csr_write(CSR_SSCRATCH, 0);
csr_write(CSR_SIE, 0);
csr_write(CSR_SATP, 0);
}
} else if (next_mode == PRV_U) {
if (misa_extension('N')) {
csr_write(CSR_UTVEC, next_addr);